How do i change the time and date!? PLEASE HELP!

Instructions from Nintendo.
' Nintendo - Customer Service ' Nintendo DS - Setting the Time and Date

Save the time and date in BIOS. Replace the CMOS battery if it still does not save.

when changing either date or time
1. set the first one then hold the center button for a few seconds then release. It should move to the next column.

Please Go To Your Mobile Setting and go to time and date Setting.

Press Menu to launch the Record/Playback menu.

Use the flower or lightning bolt keys to change the menu tab to Setup (wrench and hammer).

Use up/down to navigate to Date & Time and press OK.

Use left/right to navigate the entries and up/down to change them.

Press OK to apply changes.

My tally 9 not accepting voucher date other than 1st and 2nd

time and date will not update please help me

DK Programming
From Reception phone only
--(time set)DK- intercom #652 HH mm SECs redial
--(date Change)- intercom #651 yy mm dd redial
CTX Programming
--(time set)ctx-intercom #652 HH MM SEcs #
--(date change)-intercom #651 YY MM DD #

Do you have the ADMIN password? If so you cna change the time and date by logging into the system, press next until you get to " Time and Date " and change it there. If you do not have the ADMIN password please let me know and I'll try to help. ....Mitelmike

Hi,
Please change the Leithium battery fixed inside your fax machine, usually this the problem.
If the Date time is running in different date & time.

Please press Menu, then scrolle left of right arrow key. When you find set Date/Time enter the key mentioned in the Display key and change to your date & time.

After some time see if the date/time working normally. If not change the above mentioned battery.

regards.